Options and Earnings: Historical Patterns Around Earnings Announcements

How Earnings Announcements Affect Options Pricing

Every options contract is priced using a combination of its intrinsic value (how far it is in-the-money) and its extrinsic value — the market's estimate of how much the underlying stock could move before expiration. That extrinsic value is heavily influenced by implied volatility (IV): the higher the IV, the more expensive the options. If you are new to implied volatility, our implied volatility guide provides a full foundation before reading further.

Earnings announcements are among the most significant scheduled events in a stock's calendar. Before the report, traders and investors face genuine uncertainty about whether the company will beat or miss analyst expectations, and more importantly, what management will say about future outlook. This uncertainty is reflected directly in options prices: as the earnings date approaches, options markets typically price in a higher probability of a large price move by raising implied volatility — and thus raising premiums.

The effect is concentrated in options expiring on or just after the earnings date. If a company reports on a Tuesday evening and weekly options expire that Friday, the Tuesday-expiration or Friday-expiration options will carry dramatically elevated IV compared to options expiring several months later. This "event premium" — the extra IV embedded in near-term options — is the market's way of pricing the binary uncertainty of the earnings outcome.

Understanding this dynamic is the foundation for all earnings-related options strategies. Whether you are buying options (hoping the stock moves more than the market expects) or selling options (hoping to collect the elevated premium), your P&L will be heavily shaped by what happens to IV after the announcement — not just by the stock's direction.

IV Expansion Before Earnings: The Premium Build-Up

In the days and weeks leading up to an earnings announcement, implied volatility in the nearest-dated options tends to rise steadily. This pattern — sometimes called "IV expansion" or the "earnings run-up" in IV — occurs because:

• Option sellers demand higher premiums for the risk of a post-earnings gap
• Hedgers and speculators increasing demand for near-term options ahead of the event
• Market makers widening the implied volatility priced into near-term expirations to reflect event uncertainty

The magnitude of IV expansion varies significantly by company. Historically, large-cap, well-covered companies with long track records of stable earnings (such as consumer staples) have tended to see smaller IV expansion than high-growth technology companies, biotech firms, or any company in the middle of a turnaround story. A company reporting for the first time as a public entity may see IV expand dramatically in the days before its initial post-IPO earnings call.

It is important to note that IV expansion is specific to the earnings-adjacent expiration. Longer-dated options on the same stock — say, options expiring four months after the announcement — typically show far less IV movement ahead of earnings, because the event represents a smaller fraction of their total remaining time horizon.

IV Crush After Earnings: When Premium Evaporates

IV crush is arguably the most important phenomenon for options traders to understand about earnings. The moment a company reports — whether the news is positive, negative, or in-line — the fundamental source of near-term uncertainty is resolved. The market no longer needs to price in the possibility of surprise outcomes, and implied volatility in the near-term options collapses rapidly.

This collapse can be dramatic and fast. Near-term options that carried an IV of 80% before earnings might drop to 30–40% IV within minutes of the report being released, before the market even fully processes the content of the announcement. For an option buyer, this IV crush can offset — or even overwhelm — any gain from a favorable directional move in the stock.

Calculating the Expected Move from Options Prices

Before an earnings announcement, options traders use the prices of near-term options to calculate the expected move— the market's implied estimate of how much the stock will move in either direction through expiration. This is not a prediction; it is the market-consensus price of uncertainty at that moment in time.

Method 1: The ATM Straddle Approximation

The simplest approximation of the expected move is the price of the at-the-money (ATM) straddle for the expiration covering the earnings date:

If a stock trades at $100 and the weekly ATM call and put (both at the $100 strike) each cost $4.00, the combined straddle price is $8.00. The implied expected move is approximately $8 in either direction, or ±8% from the current price. The stock would need to move more than $8 in either direction for a long straddle buyer to profit at expiration (before accounting for transaction costs).

Method 2: Using Implied Volatility Directly

A more precise method uses the annualized implied volatility and the number of calendar days to expiration:

For example: stock at $100, IV = 80%, 7 days to expiration:

Brokerages and options analysis platforms often display the expected move directly on the options chain, making manual calculation unnecessary. However, understanding the mechanics helps traders assess whether the market is pricing in a larger or smaller move than they anticipate — which is the core judgment in any earnings-related options strategy.

Straddles and Strangles Around Earnings: Educational Overview

Two options structures are commonly discussed in the context of earnings: straddles and strangles. Both are volatility strategies — their profitability depends more on how much the stock moves (and how much IV changes) than on the direction of that move. For a full foundation on calls and puts, see our options basics guide.

The Long Straddle

A long straddle involves buying both an at-the-money call and an at-the-money put with the same strike price and the same expiration. It profits if the stock makes a large move in either direction — larger than the combined premium paid. The strategy is direction-neutral: the trader simply needs a large move.

• Maximum loss: The total premium paid for both legs (if stock is exactly at the strike at expiration)
• Break-even (upside): Strike + total premium paid
• Break-even (downside): Strike − total premium paid
• Maximum gain: Theoretically unlimited to the upside (call leg); limited to the strike price to the downside (put leg, if stock goes to zero)

The Long Strangle

A long strangle is similar to a straddle but uses out-of-the-money options: the call strike is above the current stock price and the put strike is below it. This makes the strangle cheaper than a straddle (lower premium), but the stock must move even more to reach profitability.

Historical Win Rates: A Sobering Reality

Empirical studies examining long straddle and strangle profitability around earnings have generally found unfavorable results for buyers. Research published in academic and practitioner literature — including studies examining S&P 500 component stocks over multi-year periods — has found that at-the-money straddles purchased before earnings expired at a loss in roughly 60–75% of cases across large samples of US stocks. The primary driver of these losses is that the actual post-earnings move tends, on average across many companies and quarters, to be somewhat smaller than the implied expected move priced into the options before the announcement.

This does not mean buying straddles is never profitable. For individual companies with a history of surprising the market, and in specific quarters where a major catalyst exists, the strategy can work. It also does not mean the strategy has no merit for experienced traders who carefully select stocks with historically larger-than-implied earnings moves. But the broad, undifferentiated application of "buy straddles before earnings" has historically been a negative-expectancy strategy.

Selling Premium Before Earnings: The Short Volatility Approach

Because options are systematically overpriced before earnings — as discussed in the historical win-rate research above — some traders take the opposite side: sellingnear-term options ahead of earnings to collect the elevated premium, with the expectation that IV crush will deflate the options' value rapidly after the announcement.

Common short-volatility earnings structures include:

• Short straddle: Selling the ATM call and put simultaneously — maximum profit if the stock closes exactly at the strike at expiration; maximum risk if the stock moves dramatically in either direction
• Short strangle: Selling an OTM call and OTM put — lower maximum premium collected than a straddle, but a wider range of profitable outcomes (the "wings" must be breached before losses begin)
• Iron condor: Selling a strangle but adding long OTM options on both sides to cap the maximum loss — trades off some of the premium collected for defined-risk protection

The fundamental risk of selling premium into earnings is the same as the opportunity for buyers: earnings can produce outsized moves. A company that misses badly, issues negative guidance, or surprises dramatically to the upside can gap far beyond the short options' strikes, producing a loss that exceeds the premium collected — sometimes by a large multiple.

For this reason, undefined-risk short strategies (naked short calls or naked short strangles) around earnings require significant capital, high options approval levels, and careful risk management. Most practitioners who sell premium around earnings use defined-risk structures (credit spreads, iron condors) to ensure the maximum loss is known before the trade is opened.

Calendar Spreads Around Earnings

A calendar spread (also called a time spread or horizontal spread) involves buying an option at a longer expiration and selling an option at a shorter expiration, both at the same strike. Around earnings, calendar spreads can be used to trade the differential between near-term and longer-term implied volatility.

The earnings-specific logic is as follows:

• The short leg is the near-term option with the earnings date embedded in it — carrying elevated IV due to event risk
• The long leg is a further-dated option at the same strike — carrying relatively lower IV since the event is a smaller fraction of its remaining time
• The IV differential between the two legs is the strategic core of the trade: if the near-term IV collapses after earnings (IV crush) while the longer-dated IV remains relatively stable, the spread widens, potentially profiting the calendar spread holder

The risk of a calendar spread around earnings is primarily that the stock moves so dramatically — in either direction — that both legs lose value, because large moves away from the strike reduce the value of both the short-dated and long-dated options at that strike. The calendar spread profits most when the stock closes near the strike price after earnings, allowing the short leg to expire worthless while the long leg retains significant value.

Calendar spreads around earnings require careful management of the position after the announcement, as the IV structure shifts rapidly. Traders typically close or adjust the position on the morning after earnings rather than holding the short leg all the way to its expiration.

Historical Earnings Examples: Apple, Tesla, Amazon

The following historical examples illustrate how earnings announcements have affected stock prices and options markets in the past. All data reflects actual historical events and is cited for educational purposes only. These examples do not predict future outcomes for any of these companies.

Post-Earnings Drift: What the Research Shows

Post-earnings announcement drift (PEAD) is among the most extensively documented and debated anomalies in financial markets. The basic finding, first described by Ball and Brown in their 1968 paper in the Journal of Accounting Research, is that stocks tend to continue trending in the direction of their earnings surprise for days, weeks, and even months after the announcement.

Bernard and Thomas (1989) further documented that the magnitude of the drift was correlated with the size of the earnings surprise — larger positive surprises led to greater subsequent outperformance, and larger negative surprises led to greater subsequent underperformance. Various behavioral explanations have been proposed, including underreaction to new information and investor inattention to quarterly filings.

From an options perspective, PEAD is relevant for traders considering positions with expirations beyond the immediate earnings week. If a large positive surprise is followed by multi-week drift, a call spread or outright call purchased after the earnings announcement — when IV has already crashed — could participate in the continuation move at a much lower volatility cost than pre-earnings premiums would have required.

Whether PEAD remains exploitable in contemporary markets is debated. Decades of publication and increased algorithmic trading have reduced many documented anomalies. The evidence as of recent years is mixed — PEAD appears to persist in smaller stocks and in high-surprise situations, but has become harder to exploit in large-cap, heavily covered names where information is processed more rapidly.

Earnings Season: When US Companies Report

Public companies in the US are required by the SEC to file quarterly financial reports within 45 days of the end of each fiscal quarter (for large accelerated filers; smaller companies have 40 to 90 days). Most large-cap companies voluntarily report sooner — typically within two to five weeks of quarter-end. This creates four concentrated "earnings seasons" each year.

Within each season, reporting order typically follows a pattern: major US banks (JPMorgan Chase, Bank of America, Wells Fargo, Citigroup) report in the first week, followed by industrial, consumer, and healthcare companies in the middle weeks, and technology companies often towards the latter end of the peak window. Companies with non-standard fiscal year calendars — notably retailers and technology companies such as Microsoft and Salesforce — report on different schedules. Individual earnings dates are always confirmed on the company's investor relations page and in SEC filings.

How to Read an Earnings Report: What Actually Moves Stocks

An earnings report is a multi-dimensional document. Options traders and equity investors who react only to the headline EPS and revenue numbers frequently misinterpret the market's reaction. Understanding the full structure of an earnings release — and what the market actually cares most about in any given environment — is essential context for using options around earnings.

Earnings Per Share (EPS)

EPS is the company's net income divided by its diluted share count. Analysts publish consensus EPS estimates before the report; a "beat" means the reported EPS exceeded consensus, a "miss" means it fell short. However, EPS can be influenced by one-time items, tax rate changes, and share buybacks — so it is only one signal among many. The market typically focuses on adjusted or non-GAAPEPS, which strips out non-recurring items.

Revenue

Top-line revenue shows the fundamental demand for a company's products or services. Revenue is harder to manipulate than EPS (which can be boosted by cost cuts or financial engineering), so it is often viewed as a purer signal of business momentum. A company that beats EPS but misses revenue consensus can still see its stock decline — the market may interpret cost cuts as unsustainable rather than genuine profit improvement.

Guidance: The Most Important Number

Historically, management guidance for the upcoming quarter (or full year) has driven post-earnings stock moves at least as much — and often more — than the reported results themselves. The reported quarter is the past; guidance is about the future, and the market is a forward-looking mechanism. A company can report a strong quarter but fall sharply if management guides the next quarter below analyst expectations. Conversely, a company that misses the current quarter but raises forward guidance has historically often traded higher.

Segment-Level and Qualitative Data

For complex companies with multiple business segments, the aggregate revenue and EPS numbers can mask important divergences. A cloud-computing company might miss total revenue but show accelerating cloud segment growth — a fact the market may treat positively. During the earnings call (the audio and transcript of which is typically available through the company's investor relations site and financial data platforms), management commentary on pricing trends, margin direction, competitive dynamics, and macroeconomic headwinds often shapes trading more than the numerical results alone.

What Determines the Size of the Post-Earnings Move

Research on post-earnings price reactions has found that three factors are most correlated with move magnitude: (1) the size of the surprise relative to consensus estimates, (2) the quality and credibility of the guidance provided, and (3) the pre-earnings positioning of investors — when sentiment is very bullish and positioning is crowded, even a modest beat may fail to produce a rally because the good news was already priced in. Options traders should consider not just whether the results were good or bad, but whether they were better or worse than what was already embedded in the stock price.

Frequently Asked Questions About Options and Earnings

Related Articles